l8 SPRAYING CROPS 



"The principal care in making up this wash is 

 to make sure that the sulphur is thoroughly dissolved. 

 Flowers of sulphur is apt to be more or less lumpy, 

 and these lumps are very difficult of solution. The 

 more thoroughly the stllphur is ground up with water 

 before being boiled with the lime, the less time it 

 will take in boiling. 



"An iron kettle must be used if the boiling is done 

 directly over a fire. A better and cheaper way, when- 

 ever a head of steam is available, is to place the sul- 

 phur, lime and salt together in a barrel half full of 

 water, conduct the steam through a pipe to the bottom 

 of the barrel and boil for two or three hours, with 

 occasional stirring, to make sure that nothing is set- 

 tling. If a boiler is convenient, a pipe might be so 

 arranged as to conduct steam to a number of barrels 

 at once." 



Resin Soap This substance is used for scale 

 insects, and to add to Bordeaux mixture for asparagus 

 rust. The soap is made by dissolving 7 pounds sal- 

 soda (washing soda) in 5 gallons of boiling water. 

 Then add 10 pounds resin and boil until the resin is 

 dissolved. This will require half an hour or more. 

 The result will be a yellow soap in the lower part of 

 the vessel with a brownish liquid above. The latter 

 is to be poured off, and the soap diluted as needed. 



Fish-oil Soap Professor J. B. Smith and others 

 report excellent results in the use of this substance 

 against plant-lice and similar insects. The soap is on 

 the market at about 12 cents a pound, but, according 

 to Professor Smith, it can be made much more cheaply 

 by the following formula : 



Hirsh's crystal potash lye i pound 



Fish oil 3 pints 



Soft water 3 gallons 



